Lignocellulosic n-butanol co-production in an advanced biorefinery using mixed cultures
Por:
Sanchez, A., Valdez-Vazquez, I., Soto, A., Sanchez, S., Tavarez, D.
Publicada:
1 jul 2017
Resumen:
An advanced biorefinery design is proposed for co-producing n-butanol
(butan-l-ol, CAS 71-63-3), acetone (propan-2-one, CAS 67-64-1) and
ethanol (CAS 64-17-5) (ABE), as well as hydrogen (H-2, CAS 4368-28-9)
and biogas from lignocellulosic feedstock using mixed cultures. The
biorefinery does not pretreat the feedstock and employs the
hemicellulose (CAS 9034-32-6) and cellulose (CAS 9004-34-6) feedstock
fractions for producing hydrogen and ABE in separate low-cost, low
process-complexity fermentation stages. These reaction stages were
designed based on the authors' own experimental data under Consolidated
Bioprocessing (CBP) principles. The biorefinery design also includes a
novel separation stage, electricity-steam cogeneration and heat
integration. The technical feasibility of the proposed biorefinery is
demonstrated through a parametric analysis of the total production costs
(TPC) and energy efficiency with respect to feedstock price and
biorefinery capacity. The feedstock price is proportional to its
polysaccharides content as a way of assessing the impact of limited
feedstock availability on TPC. The proposed CBP hydrogen and ABE
fermentation technologies reduced fixed capital investment 7.7fold and
8.6fold for mid-size (1000 t d(-1)) and large (2000 t d(-1)) capacities.
The end-use energy ratio achieved was between 2.14 and 2.24 for this
interval capacity. Design and process conditions were identified to
achieve similar TPCs (0.75 $ L-1 for 1000 t d(-1) and 0.63 $ L-1 for
2000 t d(-1), respectively) of sound conceptual designs previously
published employing conventional technology. The results obtained in
this study were compared with inflation-updated TPCs of
conventional-technology biorefineries from works published over the past
fifteen years, highlighting the advantages of the proposed design. (C)
2017 Elsevier Ltd. All rights reserved.
Filiaciones:
Sanchez, A.:
CINVESTAV, Ctr Invest & Estud Avanzados, Lab Futuros Bioenergia, Unidad Ingn Avanzada, Mexico City, Jalisco, Mexico
Valdez-Vazquez, I.:
Univ Nacl Autonoma Mexico, Inst Ingn, Unidad Acad Juriquilla, Mexico City, DF, Mexico
Soto, A.:
CINVESTAV, Ctr Invest & Estud Avanzados, Lab Futuros Bioenergia, Unidad Ingn Avanzada, Mexico City, Jalisco, Mexico
Sanchez, S.:
CINVESTAV, Ctr Invest & Estud Avanzados, Lab Futuros Bioenergia, Unidad Ingn Avanzada, Mexico City, Jalisco, Mexico
Tavarez, D.:
CINVESTAV, Ctr Invest & Estud Avanzados, Lab Futuros Bioenergia, Unidad Ingn Avanzada, Mexico City, Jalisco, Mexico
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